\begin{Schunk}
\begin{Sinput}
> oo$splot <- function(., ...) {
+     .$smooth(...)
+     .$plot()
+ }
> par(mfrow = c(1, 2))
> oo$splot(bass = 2)
> oo.res$splot()
\end{Sinput}
\end{Schunk}
